The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 19, 1980
Filed:
Nov. 23, 1977
Applicant:
Inventors:
Wolfgang Schubert, Bubikon, CH;
Bernhard Durrer, Stafa, CH;
Assignee:
Cerberus AG, Mannedorf, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01T / ;
U.S. Cl.
CPC ...
250381 ; 313 54 ; 313149 ; 340629 ;
Abstract
An ionization chamber of the type used in an ionization smoke detector is made adjustable. The chamber has two electrodes and one radioactive source for ionizing the electrode gap. One of the electrodes is laterally displaceable relative to the other. As a result of displacement of this electrode, areas of the electrode with differing geometrical configurations can be brought into the ionization zone of the radioactive source. Several different embodiments of the electrode with different geometrical configurations are described.